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Publication numberUS4455452 A
Publication typeGrant
Application numberUS 06/417,540
Publication date19 Jun 1984
Filing date13 Sep 1982
Priority date13 Sep 1982
Fee statusLapsed
Publication number06417540, 417540, US 4455452 A, US 4455452A, US-A-4455452, US4455452 A, US4455452A
InventorsDavid L. Schuyler
Original AssigneeTouch Activated Switch Arrays, Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Touch activated controller for generating X-Y output information
US 4455452 A
Abstract
A touch activated control unit and system provides control information representative of, and in response to, movement of a person's finger along each of two axes defined on the unit. The control system includes a touch pad as part of the control unit. Elements of the touch pad define a plurality of axes and are responsive to the proximate presence of a person's finger to provide an input in response to touching and representative of the location of the finger on each of the two axes. In this manner a touch activated controller for generating X-Y output information includes touchable traces carried on a common side of a PC board and extending in mutually normal directions. A speed scaling circuit provides improved resolution.
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Claims(6)
I claim:
1. In a touch activated controller for generating signals representative of displacement of a person's finger movement thereon along each of two axes and adapted to control apparatus responsive to said generated signals, said controller comprising a supporting layer of insulating material, a first series of elongate conductive sense elements distributed in closely spaced relation across said layer, means forming leads coupled to said elements for carrying signals thereon representative of movement of a person's finger across said elements, a second series of elongate conductive sense elements distributed across said layer and disposed between adjacent pairs of said first series, the elements of said second series being divided into a series of increments distributed lengthwise thereof, and means forming conductors coupled to adjacent increments from pairs of said second series of elements for carrying signals thereon representative of movement of a person's finger along said elements of said second series.
2. In the method of generating X-Y output information from a touch activated controller having a sensor board assembly across which a person can move an activator to be sensed along each of two axes to supply input information, the method serving to modify the resolution of the output information with respect to the movement of the activator, the method including the steps of determining the speed of movement of an activator along a given axis of said sensor board, establishing a series of various speed ranges, associating different factors with respect to each speed range, comparing the first named speed with said ranges, and multiplying said first named speed by the factor associated with that one of said ranges which includes said speed.
3. In the method according to claim 2 in which the activator is a person's finger.
4. In a touch activated controller for generating signals representative of displacement of a person's finger movement thereon along each of two axes and adapted to control apparatus responsive thereto, said controller comprising a supporting substrate of insulating material, a first series of elongate conductive elements distributed in closely spaced relation across one face of said substrate, means forming first conductors coupled to said elements for carrying signals thereon responsive to movement of a person's finger thereacross, a second series of elongate conductive elements distributed across said substrate and disposed to include portions lying between adjacent pairs of said first series and on the same face thereof, and means forming conductors coupled to adjacent portions taken from pairs of said second series of elements for carrying signals thereon responsive to movement of a person's finger along said elements of said second series.
5. In a touch activated controller according to claim 4 comprising means forming a guard plane disposed in parallel spaced relation beneath the reverse face of said substrate, means for biasing said guard plane, the last named conductors being carried between said guard plane and said substrate, means for alternately sampling the capacitive coupling for all of said first series of conductors and all of said second series of conductors, and means for reducing the bias applied to said guard plane for sampling said second series of conductive elements to provide a balanced capacitive coupling as between said first and second series.
6. A touch activated controller according to claim 4 in which each of said elements and their associated first conductors of said first series have substantially the same capacitance with respect to said guard plane and each of said elements and their associated second conductors of said second series have substantially the same capacitance with respect to said guard plane to provide substantially uniform capacitive coupling between the elements and associated conductors along each of two axes.
Description

This invention pertains to a touch activated controller unit and system for providing control information representative of and in response to movement of a person's finger along each of two axes defined on the unit. Preferably the control information which is generated serves to control apparatus in response thereto in a manner representative of the finger movement.

The invention is particularly useful, for example, in providing a trace on a video display in response to defining a related trace on the control unit by means of a person's finger. As disclosed, the two axes are normal to one another to provide control information for both the X and Y axes.

While touch activated controllers have previously been known of a type in which the movement of a person's finger is limited to a single axis as shown in U.S. Letters Pat. No. 4,221,975, a need has existed to provide a touch activated controller for generating control signals in response to finger movement along a plurality of axes.

However, the lack of fine resolution of control signals derived directly from the use of a person's finger on a touch activated control unit has previously been observed to be a limiting characteristic of such units.

In general, there has been disclosed a touch activated control unit and system providing control information representative of and in response to movement of a person's finger along each of two axes defined on the unit. The control system includes a touch pad as part of the control unit and means responsive to the proximate presence of a person's finger or other suitable body part with respect to elements of said touch pad defining a plurality of axes to provide an input in response thereto representative of the location of the finger on each of the two axes.

In general it is an object of this invention to provide a touch activated control unit and system to supply information representative of the movement of a person's finger along a plurality of axes.

Another object of the invention is to provide such a touch activated control unit constructed and arranged to have a minimum crosstalk between a first series of elements when touched and a second series of elements.

The foregoing and other objects of the invention will become more readily evident from the following detailed description of a preferred embodiment when considered in conjunction with the drawings.

FIG. 1 shows a diagrammatic representation of a touch activated control system as employed to control a trace on a video display in response to movement of a person's finger on a touch pad;

FIG. 2 shows a diagrammatic representation of a side elevation section view of a portion of the surface of the touch pad shown in FIG. 1 and taken along the line 2--2 of FIG. 1;

FIGS. 3 and 4, respectively, show diagrammatic views of the top and bottom of a sensor board as shown in FIG. 1;

FIGS. 3A and 4A respectively show an enlarged plan and elevation view of a portion of FIGS. 3 and 4, FIG. 4A being in section;

FIG. 5 shows a diagrammatic elevation section view of an X and a Y sensing element;

FIG. 6 shows a diagrammatic view of an operational amplifier for purposes of explanation of the operational amplifier employed in the system shown in FIG. 10;

FIG. 7 shows a diagrammatic view of a multiplexing unit for gating various pairs of inputs to outputs thereof;

FIG. 8 shows a chart for purposes of explanation of the operation of the multiplexing unit of FIG. 7;

FIG. 9 shows a chart for purposes of explanation of the feature described herein of speed scaling; and

FIG. 10 shows a diagrammatic system arrangement according to the invention.

While the invention as disclosed herein has a utility in various applications, for purposes of explanation herein the application shown in FIG. 1 will be described in detail. In addition, while the application of the invention herein pertains to the use of the movement of person's finger to define a given trace on a sensing board 11 it will also be readily evident that other suitable body parts such as a person's knuckle or the like can be used to effect comparable results.

As described further below with respect to FIGS. 3, 4 and 5, sensing board 11 is arranged to provide a sequence of output signals along both an X and a Y axis and as arranged a total of fifteen output signals are derived from movement along each of the X and Y axes. Lead 12 represents a composite of eight individual leads whereby eight X outputs appear. Similarly, the remaining seven X outputs appear on composite lead 13. Likewise eight Y outputs are taken from eight leads shown as a single composite lead 14 while the remaining seven Y outputs are sensed via the seven Y output leads shown as a single composite lead 16. System 17 coupled by leads 12, 13, 14, 16 to sensing board 11 serves to provide control information representative of, and in response to, movement of a person's finger along each of the X and Y axes on sensor board 11 for controlling appropriate apparatus. One such appropriate apparatus includes a video display 18 as shown in FIG. 1.

The control information generated by system 17 can, for example, be coupled to a raster control unit 19 for operating video display 18 to reproduce a trace 21.

The top and bottom of sensor board 11 have been shown respectively in FIGS. 3 and 4 now to be described.

Board 11 comprises a supporting layer of insulating material such as printed circuit board material. A first series of elongate conductive elements 22 distributed cyclically across the width of the board in closely spaced relation provide three sequences of fifteen conductors 22 each whereby a person's finger can move across a total of forty-five conductors for sensing movement in the horizontal or X axis direction. Means forming leads coupled to the X axis elements 22 serve to carry signals thereon responsive to movement of a person's finger along the X axis, i.e. from left to right or right to left across the top of sensing board 11.

Between adjacent pairs of traces 22 lie elongate segmented traces 24. The increments 26 of each trace 24 are distributed lengthwise of its associated trace 24. However, each row of increments has been joined by associated conductors 27 (FIG. 4) by providing leadthrough openings 28 of minimum size whereby connection can be made to conductors 27. Means for coupling each of conductors 27 to an associated one of common lines 29 includes feedthrough openings 31 which pass upwardly through board 11 to leads 32. The ends of leads 32 include an additional leadthrough connection 33 electrically coupled to an associated one of the common lines 29.

As thus arranged each conductor 27 feeds upwardly to the top of board 11 to provide information on leads 32. It is to be observed that the outer ends of leads 32 include leadthrough connections 33 which provide a connection leading downwardly through the board 11 and connect with common lines 29. Common lines 29, on the bottom of board 11, shown in FIG. 4, extend to an associated one of eight output pins 34. Similarly, at the left end of lines 27 additional feedthrough openings 31 extend upwardly to the top surface of board 11 to make connection with additional leads 32. The ends of those leads 32, shown on the left hand side of FIG. 3, formed with leadthrough openings 33 make connection with an associated one of several common lines 36 leading to the seven output pins Y9 through Y15 and designated by the numeral 37.

Accordingly, leads 29 and 36 carry signals thereon responsive to movement of a person's finger along the incremental elements 26.

Similarly, with reference to the X traces 22 information with respect to the lateral position of a person's finger is taken via the feedthrough openings 38 to associated common lines 39.

As shown in FIG. 3a an enlarged portion of the top surface of sensor board 11 is shown so as to disclose the presence of the feedthrough openings 28 as shown in side elevation view in FIG. 4a for making connection to conductors 27.

From inspection it will be readily evident that the circuit path lengths for all of the X lines 23 is the same. Similarly, the length of the circuit path for all of the Y lines is the same. It has been observed that by making all of the circuit path lines along each axis the same it is possible to provide a balanced input signal from the various positions located on the sensor board.

Finally, as shown in FIG. 5, sensor board 11 includes a double sided PC board forming a substrate of insulation material 41 and a single sided substrate of PC board material 42 secured together to provide a semi-rigid foundation for the sensor board. Substrate 42 carries a clad 43 of copper material on its bottom surface to serve as a guard plane for reasons explained in detail further below.

As diagrammatically illustrated in FIG. 5 the capacitive coupling between the X traces will be less than for the Y traces since the latter also include the capacitance of the nearby conductors 27, as explained below. In view of the fact that all of the X and Y lines are sampled by the system alternately an alternating bias voltage represented by the square wave 44 is applied to guard plane 43 via lead 46. Accordingly, this bias voltage alternates for the readout of the X and Y traces, the X traces being read out when the bias voltage is greater. Thus, a balanced coupling for both coordinates X and Y can be achieved as explained in greater detail further below.

Input signals applied to each X axis trace 22 and to the increments 26 (which make up Y axis traces 24) are derived by grounding the slight capacitive coupling defined between a person's finger 15 and traces 22 or increments 26, as shown diagrammatically in FIG. 2.

Thus, when an activator, such as a person's finger 15, moves across axis traces 22 and increments 26 of Y axis traces 24, finger 15 completes the formation of a sequence of "capacitors" coupled as inputs to a number of sensing circuits 57, 58, 63, 64. In this way, and as shown in FIG. 2, with a broad area of skin overlaid in uniformly spaced relation to traces 22, 24, portions of the skin area can be considered to constitute the equivalent of plate of "capacitors" while the conductive elements 22, 26 form the other plates (when in the proximate presence of finger 15). Each "capacitor" formed in this manner is coupled to ground via the person's body.

While an equivalent form of contact or other activator can be formed to operate the system herein, the present system will be described with respect to its operation in response to movements of a finger across the surface 25a of a uniform layer 25 having in mind that other types of activator can be used to develop similar inputs.

As arranged, fifteen output leads for the X and Y axis traces 22, 24 are repeated three times and coupled sequentially in common to provide sufficient displacement on sensor board 11 along the X and Y axes as described in the above identified patent.

Sufficient spread must exist between the first and the last trace or sense line in each group so that there is little likelihood that the finger will cover all sense lines simultaneously. With all sense lines of a given group covered it is not possible to determine motion of the finger using the arrangement described further below. Thus, the spread between the first and last sense line within each group thereof is deemed to be a "maximum fingerprint".

Means for detecting the output from sensing board 11 and for generating control signals therefrom are shown in FIG. 10. The system of FIG. 10 includes operational amplifiers 47 as shown in FIG. 6 and multiplexing units as shown in FIG. 7, both as now to be described.

The operational amplifier 47 (when properly biased) provides a digital output signal on line 48 in response to sensing of ground on input lead 49 as provided by the presence of a finger associated with a related trace on sensing board 11. The operational amplifier is biased between the +V and -V voltages. If +V is considered to be substantially five volts, when the -V input rises to substantially five volts (or the equivalent of the +V input) amplifier 47 will be disabled so as to be unable to provide any output on lead 48. However, when the -V input drops to zero then amplifier 47 becomes enabled whereby the sensing of ground on input lead 49 can provide a suitable output on lead 48.

With reference to the multiplexing unit 57 shown in FIG. 7 and in FIG. 10 four pairs of inputs are provided from the X and Y sources. For example, as shown in FIG. 7 the first four inputs are taken from the X1, X2, X9, X10 connector pins of sensor board 11. The remaining four inputs are arranged in pairs and receive information sensed from the Y1, Y2, Y9, and Y10 connector pins of board 11. Means as described in the system shown in FIG. 10 provides digital gating control signals to the multiplexing unit 51 to gate one of the four pairs of inputs to the single pair of outputs 54, 56.

Accordingly, a digital 0 or a digital 1 will appear on each of the two lines 52, 53 (referred to hereinafter as the A and B gating lines) to operate unit 51 in accord with the chart of FIG. 8. When the signals on lines A and B are both 0 the output gated from multiplex unit 51 onto the output leads 54, 56 will be information from the connector pins designated X1, X2. When the A line carries a digital 0 and the B line carries a digital 1 then unit 51 gates the outputs from the next pair of input leads (from X9, X10) The information from the Y connector pins is provided in the same way in response to the gating signals shown in FIG. 8.

Multiplexing of the kind described is not believed to be part of the invention as it is believed to be known in the art to provide the foregoing type of gating function.

In the interest of simplifying the drawing shown in FIG. 10 and to eliminate a number of lines making it difficult to understand, multiple lines taken from the X and Y connector pins, such as output pins 37 of FIG. 4, have been represented by a single composite lead 16 for the seven leads which are actually taken from the group of connector pins 37. Each of these seven extends to an associated operational amplifier 57 for transmitting information pertaining to traces Y9 through Y15. More specifically, as shown in FIG. 10, with respect to the composite lead 12 coupled to output pins 34 associated with the X1 through X8 traces a bracket has been shown adjacent these eight leads which then are represented by composite lead 12. Lead 12 can therefore, be respectively coupled to eight operational amplifiers 58. The outputs of amplifiers 58 are fed variously by their respective output leads (not shown) to the input terminals of various multiplexing units 51, 66-68. As noted above, when the bias applied to the -V terminal of the operational amplifiers is zero then they are enabled whereas when the bias at -V is at substantially +5 the operational amplifiers will be disabled.

Accordingly, as shown in FIG. 10, a train of square wave pulses 61 generated on control line 62 serve to alternately enable and disable all operational amplifiers 58 and those of three additional groups of operational amplifiers 57, 63, 64 which are each shown as a composite representation of the appropriate number of individual amplifiers of the group. Subsequently, when control pulses 61 on control line 62 drop to zero volts all operational amplifiers 57, 58, 63, 64 become enabled whereby the presence of a person's finger associated with any of the input leads will be supplied via an associated one of the operational amplifiers to an associated one of the inputs as found among the four multiplex units 51, 66-68.

Accordingly, while amplifier 58 includes eight individual amplifiers for providing output signals representative of sensing the presence of a finger at any one of the eight X traces 22 these outputs, X1 through X8 are connected variously to the multiplex units as indicated at the input side of each multiplex unit. Thus, the outputs of amplifier 58 for an input representative of finger contact with traces associated with X1 and X2 are coupled to multiplex unit 51. The outputs from amplifier 58 representative of finger contact with traces X3 and X4 are coupled to multiplex unit 66. Similarly, the outputs of amplifier 58 for X5 and X6 are coupled to multiplex unit 67 and finally, the outputs from amplifier 58 for X7 and X8 are coupled to multiplex unit 68. In the same manner the outputs from each of the remaining operational amplifiers are coupled to associated inputs of one or another of the various multiplex units.

A microcontroller 69 constructed in accordance with known techniques to provide known functions as listed below controls the readout of the X traces alternately with the readout of the Y traces.

A preliminary function of controller 69 serves to turn "ON" a sequence of clock pulses 61 for enabling and disabling operational amplifiers 57, 58 and 63, 64. An additional function is to switch "ON" an appropriate number of resistors 71, 72, 73, 74 to provide an appropriate bias voltage to guard plane 43 (represented in FIG. 10 by the numbers 43') along the path traced by lead 62 from the output of controller 69, along line 76 to a lead 46 disposed in common to each of the guard plane representations 43'.

As noted in FIG. 10, the guard plane 43 as represented by number 43' forms the bottom plate of a capacitance. The top plates of each have been shown in dotted lines simply to represent a certain amount of capacitive coupling to the sense lines or traces. Thus, it will be readily evident that the amount of capacitive coupling will be greater when the Y traces are being readout than when the X traces are being readout in view of the fact that the Y traces include the capacitance of their connecting lines 27 disposed beneath the top substrate 41 and much closer to guard plane 43 than traces carried on the upper surface of the same substrate 41. Accordingly, an alternating bias to guard plane 43 balances the capacitive coupling for both the X and Y traces inasmuch as the capacitive coupling for the X traces will be less. For example, as shown in FIG. 5, capacitive coupling is shown between increment 26 and guard plane 43 as well as for the proximate conductor 27. The total amount of capacitive coupling is additive so as to provide the greater additional capacitive coupling during readout of the Y traces.

Controller 69 further includes means for sampling the condition of each trace by gating the pairs of signals through each multiplex unit 51, 66-68. Accordingly, the output leads 54, 56 are represented by the composite lead 78 to supply the gated information to one of eight inputs to an Octal Schmidt trigger 79.

As is known, the octal style of Schmidt trigger 79 includes essentially the equivalent of eight Schmidt triggers which are respectively associated with the eight inputs thereto Schmidt triggers 79 provide a stable output to controller 69. In this way information as to the status of X and Y traces is supplied to micro-controller 69 from each of the fifteen X and fifteen Y output pines as a person moves a finger across sensing board 11.

The incoming information is stored by known means, as in a given register within micro-controller 69. Subsequent information is received in another register formed by known manufacturing techniques within micro-controller 69 whereby the information in the two registers is subsequently compared so as to determine incremental motion information between the two successive samplings thereby indicating physical displacement. The velocity of this incremental motion is determined by sampling the traces at a fixed time rate. Thus, by sampling incremental motion at a fixed time rate the controller can determine the velocity or rate of change of displacement of the person's finger passing across the sensor board.

In view of the fact that a given location established by a person's finger applied to a sensor board 11 would have limited resolution when reproduced on a video screen, for example, means as now to be described have been provided for creating relatively high quality resolution as well as for increasing the rate of output information as may control movement of a cursor appearing on the face of a video display 18, for example, controlled by suitable output signals on lead 20 representing one or more specific conductors as may be needed to be coupled to raster control 19.

In general, means serving to increase or decrease the velocity of a video trace or other output manifestation can be increased or decreased as now to be described.

As arbitrarily shown in FIG. 9, a chart indicates that if a person's finger crosses between zero and five sense lines per second the speed at which the person is crossing these lines is multiplied by a factor of 0.25. When a person moves a finger at the rate of six to eight sense lines per second the velocity of finger movement is multiplied by a factor of one. However, if the person moves his finger at a rate of nine to twelve sense lines per second then the output is doubled and if a person moves his finger at the rate of thirteen or more sense lines per second the velocity of movement is multiplied by a factor of four.

Accordingly, suitable storage means in micro-controller 69 contains information representative of the various ranges of rates of incremental motion information. Means are further provided according to known construction for comparing the rate of incremental motion information to the various stored ranges of rates. A given multiplier is also stored in association with each range. Further, means for multiplying the incremental motion information by the multiplier associated with that one of the ranges which includes the sensed rate of incremental motion. Means are further provided for storing or accumulating the product of the last named multiplication whereby, as desired, the stored product can be supplied from micro-controller 69.

Using the foregoing technique, accuracy or resolution of the location of a person's finger can be significantly enhanced by moving the finger relatively slowly across the surface of the traces.

Thus, by known construction micro-controller 69 includes means for carrying out the following functions, the speed of the output information can be controlled in response to varying the speed of movement of the person's finger. The method includes the steps of determining the speed of movement of a person's finger along a given axis, establishing a series of various speed ranges, comparing the first named speed with said ranges, and multiplying said speed by a factor associated with that one of said ranges which includes said speed.

From the foregoing it will be readily evident that there has been provided an improved touch activated controller characterized by means for balancing the capacitive coupling between both X and Y traces and the guard plane so that the capacitive coupling will remain substantially the same when sampling eight the X or the Y traces. In addition, there has been disclosed means for substantially enhancing the resolution of output information with respect to the input information derived from movement of a person's finger across the sensing board.

Further, as disclosed herein the design provides a maximum of sensitivity while inhibiting crosstalk between the X and Y axes. In addition, the circuit paths for all of the X traces are of equal length, as well as all of the Y traces so as to minimize variations in the capacitive coupling among the various traces.

It has been observed that, as shown in the drawings, by making all of the x axis sense lines 22 and their associated leads or conductors 23 of equal length their capacitance will be substantially equal with respect to the guard plane 43 so as to provide substantially uniform capacitive coupling thereto along the X axis. Similarly, the Y axis sense lines formed by rows of increments and their associated conductors 27 are of substantially equal length to also provide substantially uniform capacitive coupling with respect to the guard plane 43.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US4221975 *19 Apr 19789 Sep 1980Touch Activated Switch Arrays, Inc.Touch activated controller and method
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4550221 *7 Oct 198329 Oct 1985Scott MabusthTouch sensitive control device
US4677259 *31 Mar 198630 Jun 1987Pentel Kabushiki KaishaPosition determination device
US4707573 *23 Oct 198617 Nov 1987The De La Rue CompanyElectrical conductor array
US4850015 *27 Oct 198718 Jul 1989Gary MartinVehicular steering wheel telephone apparatus
US5648642 *25 Oct 199415 Jul 1997Synaptics, IncorporatedObject position detector
US5650597 *20 Jan 199522 Jul 1997Dynapro Systems, Inc.Capacitive touch sensor
US5737740 *25 Oct 19957 Apr 1998NumonicsApparatus and method for processing electronic documents
US5757368 *27 Mar 199526 May 1998Cirque CorporationSystem and method for extending the drag function of a computer pointing device
US5790107 *7 Jun 19954 Aug 1998Logitech, Inc.Touch sensing method and apparatus
US5796389 *2 May 199518 Aug 1998International Game TechnologyReduced noise touch screen apparatus and method
US5825352 *28 Feb 199620 Oct 1998Logitech, Inc.Multiple fingers contact sensing method for emulating mouse buttons and mouse operations on a touch sensor pad
US5841078 *30 Oct 199624 Nov 1998Synaptics, Inc.Object position detector
US5854625 *6 Nov 199629 Dec 1998Synaptics, IncorporatedForce sensing touchpad
US5861583 *15 Jul 199619 Jan 1999Synaptics, IncorporatedObject position detector
US5861875 *11 Dec 199619 Jan 1999Cirque CorporationMethods and apparatus for data input
US5880411 *28 Mar 19969 Mar 1999Synaptics, IncorporatedObject position detector with edge motion feature and gesture recognition
US5889236 *13 Nov 199530 Mar 1999Synaptics IncorporatedPressure sensitive scrollbar feature
US5897648 *20 Dec 199627 Apr 1999Numonics CorporationApparatus and method for editing electronic documents
US5920309 *4 Jan 19966 Jul 1999Logitech, Inc.Touch sensing method and apparatus
US5942733 *19 Oct 199524 Aug 1999Synaptics, Inc.Stylus input capacitive touchpad sensor
US6002389 *23 Sep 199714 Dec 1999Logitech, Inc.Touch and pressure sensing method and apparatus
US6028271 *24 Mar 199822 Feb 2000Synaptics, Inc.Object position detector with edge motion feature and gesture recognition
US6147680 *3 Jun 199714 Nov 2000Koa T&T CorporationTouchpad with interleaved traces
US6222528 *7 Mar 199724 Apr 2001Cirque CorporationMethod and apparatus for data input
US623938921 Jun 199929 May 2001Synaptics, Inc.Object position detection system and method
US638092920 Sep 199630 Apr 2002Synaptics, IncorporatedPen drawing computer input device
US638093118 May 200130 Apr 2002Synaptics IncorporatedObject position detector with edge motion feature and gesture recognition
US639652314 Mar 200028 May 2002Interlink Electronics, Inc.Home entertainment device remote control
US641467124 Mar 19982 Jul 2002Synaptics IncorporatedObject position detector with edge motion feature and gesture recognition
US647679822 Aug 19945 Nov 2002International Game TechnologyReduced noise touch screen apparatus and method
US661093612 Aug 199726 Aug 2003Synaptics, Inc.Object position detector with edge motion feature and gesture recognition
US673086322 Jun 20004 May 2004Cirque CorporationTouchpad having increased noise rejection, decreased moisture sensitivity, and improved tracking
US673484324 Oct 200211 May 2004IgtReduced noise touch screen apparatus and method
US675085223 Jan 200315 Jun 2004Synaptics, Inc.Object position detector with edge motion feature and gesture recognition
US676555710 Apr 200020 Jul 2004Interlink Electronics, Inc.Remote control having touch pad to screen mapping
US710997826 Mar 200419 Sep 2006Synaptics, Inc.Object position detector with edge motion feature and gesture recognition
US7710404 *19 Jan 20064 May 2010Elan Microelectronics CorporationMethod for gesture detection on a touchpad
US779711513 Aug 200714 Sep 2010Nuvoton Technology CorporationTime interval measurement for capacitive detection
US7804490 *19 Jan 200628 Sep 2010Elan Microelectronics CorporationMethod for multiple gesture detection and verification on a touchpad
US788935324 Aug 200615 Feb 2011Koninklijke Philips Electronics N.V.Method of measuring relative movement of an object and an optical input device over a range of speeds
US794539910 Aug 201017 May 2011Nuvoton Technology CorporationCapacitive detection systems, modules and methods
US816941910 Aug 20101 May 2012Nuvoton Technology CorporationPower efficient capacitive detection
US833074315 Feb 201211 Dec 2012Nuvoton Technology CorporationPower efficient capacitive detection
US84110614 May 20122 Apr 2013Apple Inc.Touch event processing for documents
US84161964 Mar 20089 Apr 2013Apple Inc.Touch event model programming interface
US842889330 Aug 201123 Apr 2013Apple Inc.Event recognition
US842955726 Aug 201023 Apr 2013Apple Inc.Application programming interfaces for scrolling operations
US855299928 Sep 20108 Oct 2013Apple Inc.Control selection approximation
US85609756 Nov 201215 Oct 2013Apple Inc.Touch event model
US856604431 Mar 201122 Oct 2013Apple Inc.Event recognition
US856604531 Mar 201122 Oct 2013Apple Inc.Event recognition
US86458274 Mar 20084 Feb 2014Apple Inc.Touch event model
US866136322 Apr 201325 Feb 2014Apple Inc.Application programming interfaces for scrolling operations
US868260214 Sep 201225 Mar 2014Apple Inc.Event recognition
US87173054 Mar 20086 May 2014Apple Inc.Touch event model for web pages
US872382217 Jun 201113 May 2014Apple Inc.Touch event model programming interface
US8760411 *1 Jul 200824 Jun 2014Touchscreen Gestures, LlcMethod for determining the number of fingers on a sensing device
US883665217 Jun 201116 Sep 2014Apple Inc.Touch event model programming interface
US903799525 Feb 201419 May 2015Apple Inc.Application programming interfaces for scrolling operations
US909213231 Mar 201128 Jul 2015Apple Inc.Device, method, and graphical user interface with a dynamic gesture disambiguation threshold
US912861418 Nov 20138 Sep 2015Apple Inc.Device, method, and graphical user interface for manipulating soft keyboards
US914128530 Mar 201122 Sep 2015Apple Inc.Device, method, and graphical user interface for manipulating soft keyboards
US914667330 Mar 201129 Sep 2015Apple Inc.Device, method, and graphical user interface for manipulating soft keyboards
US920782324 Dec 20138 Dec 2015Samsung Electronics Co., Ltd.Capacitive touch system with improved touch sensing precision and coordinate extraction method thereof
US928590813 Feb 201415 Mar 2016Apple Inc.Event recognition
US929836311 Apr 201129 Mar 2016Apple Inc.Region activation for touch sensitive surface
US931111231 Mar 201112 Apr 2016Apple Inc.Event recognition
US93233358 Mar 201326 Apr 2016Apple Inc.Touch event model programming interface
US934847723 Dec 201424 May 2016Synaptics IncorporatedMethods and systems for detecting a position-based attribute of an object using digital codes
US93897123 Feb 201412 Jul 2016Apple Inc.Touch event model
US943638130 Mar 20116 Sep 2016Apple Inc.Device, method, and graphical user interface for navigating and annotating an electronic document
US94426542 Dec 201313 Sep 2016Apple Inc.Apparatus and method for conditionally enabling or disabling soft buttons
US944871214 May 201520 Sep 2016Apple Inc.Application programming interfaces for scrolling operations
US94831211 Oct 20131 Nov 2016Apple Inc.Event recognition
US952951930 Sep 201127 Dec 2016Apple Inc.Application programming interfaces for gesture operations
US957564830 Sep 201121 Feb 2017Apple Inc.Application programming interfaces for gesture operations
US95886164 May 20157 Mar 2017Corning IncorporatedCantilevered displacement sensors and methods of determining touching forces on a touch screen
US963926030 Sep 20112 May 2017Apple Inc.Application programming interfaces for gesture operations
US966526530 Aug 201130 May 2017Apple Inc.Application programming interfaces for gesture operations
US968452128 May 201020 Jun 2017Apple Inc.Systems having discrete and continuous gesture recognizers
US969048129 Jun 201627 Jun 2017Apple Inc.Touch event model
US969686325 Apr 20164 Jul 2017Synaptics IncorporatedMethods and systems for detecting a position-based attribute of an object using digital codes
US972059430 Aug 20111 Aug 2017Apple Inc.Touch event model
US973371629 May 201415 Aug 2017Apple Inc.Proxy gesture recognizer
US976027219 Sep 201612 Sep 2017Apple Inc.Application programming interfaces for scrolling operations
US20030067451 *14 Nov 199510 Apr 2003James Peter TaggCapacitive touch detectors
US20040178997 *26 Mar 200416 Sep 2004Synaptics, Inc., A California CorporationObject position detector with edge motion feature and gesture recognition
US20050233287 *13 Apr 200520 Oct 2005Vladimir BulatovAccessible computer system
US20070013669 *19 Jan 200618 Jan 2007Yung-Lieh ChienMethod for gesture detection on a touchpad
US20070222764 *22 Mar 200627 Sep 2007Centrality Communications, Inc.Glide touch sensor based interface for navigation infotainment systems
US20070222767 *27 Jul 200627 Sep 2007David WangGlide touch sensor based interface for navigation infotainment systems
US20080088595 *12 Oct 200617 Apr 2008Hua LiuInterconnected two-substrate layer touchpad capacitive sensing device
US20080168402 *7 Jan 200710 Jul 2008Christopher BlumenbergApplication Programming Interfaces for Gesture Operations
US20080168478 *7 Jan 200710 Jul 2008Andrew PlatzerApplication Programming Interfaces for Scrolling
US20080204413 *27 Feb 200728 Aug 2008Integrated System Solution Corp.Operation method of wireless pointing input apparatus
US20080225300 *24 Aug 200618 Sep 2008Koninklijke Philips Electronics, N.V.Method of Measuring Relative Movement of an Object and an Optical Input Device Over a Range of Speeds
US20090045822 *13 Aug 200719 Feb 2009Windbond Electronics CorporationCapacitive detection systems, modules and methods
US20090045823 *13 Aug 200719 Feb 2009Winbond Electronics CorporationPower efficient capacitive detection
US20090046827 *13 Aug 200719 Feb 2009Winbond Electronics CorporationTime interval measurement for capacitive detection
US20090184934 *1 Jul 200823 Jul 2009Jao-Ching LinMethod For Determining The Number Of Fingers On A Sensing Device
US20100185948 *30 Mar 201022 Jul 2010Samsung Electronics Co., Ltd.User interface systems and methods for manipulating and viewing digital documents
US20100185975 *30 Mar 201022 Jul 2010Samsung Electronics Co., Ltd.User interface systems and methods for manipulating and viewing digital documents
US20100302198 *10 Aug 20102 Dec 2010Nuvoton Technology CorporationPower Efficient Capacitive Detection
US20100324841 *10 Aug 201023 Dec 2010Nuvoton Technology CorporationCapacitive Detection Systems, Modules and Methods
US20100325575 *26 Aug 201023 Dec 2010Andrew PlatzerApplication programming interfaces for scrolling operations
US20110007019 *7 Jul 200913 Jan 2011Nuvoton Technology CorporationSystems and methods for using tft-based lcd panels as capacitive touch sensors
US20110012853 *13 Jul 201020 Jan 2011Sean ChangTouch panel
US20110179386 *31 Mar 201121 Jul 2011Shaffer Joshua LEvent Recognition
US20110181526 *28 May 201028 Jul 2011Shaffer Joshua HGesture Recognizers with Delegates for Controlling and Modifying Gesture Recognition
CN101310247B24 Aug 20062 Jan 2013皇家飞利浦电子股份有限公司Method of measuring relative movement of an object and an optical input device over a range of speeds
DE3610821A1 *1 Apr 19869 Oct 1986Pentel KkPositionserfassungsvorrichtung
DE19542407A1 *14 Nov 199523 May 1996Alps Electric Co LtdCapacitative coordinate input device for data entry by pen or stylus or finger of user
DE19542407C2 *14 Nov 199529 Jun 2000Alps Electric Co LtdKoordinateneingabevorrichtung
EP0178157A2 *8 Oct 198516 Apr 1986Sony CorporationSignal reproduction apparatus
EP0178157A3 *8 Oct 198515 Apr 1987Sony CorporationSignal reproduction apparatus
EP0225033A1 *22 Oct 198610 Jun 1987The De La Rue Company PlcElectrical conductor array
EP1298803A2 *5 Apr 19952 Apr 2003BINSTEAD, Ronald PeterMultiple input proximity detector and touchpad system
EP1298803A3 *5 Apr 19954 Jul 2007BINSTEAD, Ronald PeterMultiple input proximity detector and touchpad system
WO2007026293A3 *24 Aug 20068 May 2008Paraskevas DuniasMethod of measuring relative movement of an object and an optical input device over a range of speeds
Classifications
U.S. Classification178/18.06, 345/173
International ClassificationG06F3/047, G06F3/033
Cooperative ClassificationG06F3/047
European ClassificationG06F3/047
Legal Events
DateCodeEventDescription
30 Mar 1984ASAssignment
Owner name: TOUCH ACTIVATED SWITCH ARRAYS, INC., SANTA CLARA,
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SCHUYLER, DAVID L.;REEL/FRAME:004240/0271
Effective date: 19840130
21 Dec 1987FPAYFee payment
Year of fee payment: 4
21 Jan 1992REMIMaintenance fee reminder mailed
21 Jun 1992LAPSLapse for failure to pay maintenance fees
25 Aug 1992FPExpired due to failure to pay maintenance fee
Effective date: 19920621